Swiss cottage (6)
I believe the answer is:
chalet
'swiss cottage' is the definition.
(type of cottage often found in Swiss Alps)
'swiss' is the wordplay.
I cannot really understand how this works, but
'swiss' could be 'ch' and 'ch' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for chalet that I've seen before include "Wooden house of Alpine regions" , "Swiss-style holiday house" , "Swiss cottage or small villa" , "Originally an alpine cowherd's hut" , "Wooden villa" .)